308509968 has 40 divisors (see below), whose sum is σ = 858292288. Its totient is φ = 94925952.

The previous prime is 308509967. The next prime is 308509969. The reversal of 308509968 is 869905803.

It is an interprime number because it is at equal distance from previous prime (308509967) and next prime (308509969).

It is a super-2 number, since 2×308509968² = 190356800710722048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (308509961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246580 + ... + 247827.

Almost surely, 2^308509968 is an apocalyptic number.

It is an amenable number.

308509968 is an abundant number, since it is smaller than the sum of its proper divisors (549782320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

308509968 is a wasteful number, since it uses less digits than its factorization.

308509968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494431 (or 494425 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 308509968 is about 17564.4518274838. The cubic root of 308509968 is about 675.7038605771.

The spelling of 308509968 in words is "three hundred eight million, five hundred nine thousand, nine hundred sixty-eight".